This Standard establishes the procedures for determining tooth thickness measurements of external
and internal cylindrical involute gearing. It includes equations and calculation procedures for the
commonly used measuring methods. A specific tooth thickness measurement limit can be established
from the design thickness or from another tooth thickness measurement. The procedures can be entered
with an established design tooth thickness, or with actual tooth thickness measurements. The effect of
tooth geometric quality variations on tooth thickness measurements is discussed. Backlash information is
provided in an appendix.
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